Difference between S function and MATLAB Function?

Hello

I would like to know whats the difference between Matlab function and S function? Can I use any of them for any system? What is the necessity of using S functions over Matlab functions (the cases)?

Answer 1

[Raj]

Hello,

MATLAB function or User defined function allows you to write your own function in MATLAB language. This is basically used in Simulink where using inbuilt blocks complicates the model. S function block on the other hand allows you to integrate an executable version of your code in other high level programming languages line C,C++,Digital FORTRAN etc into simulink. You need to have a compiler for respective language. For example the MING compiler works perfectly for integrating Fortan code into Simulink.

[Walter Roberson]

Also Level 2 S functions have a closer interface to the internals of Simulink .

[Raj]

Can you please elaborate a little bit? Thanks in advance.

[Walter Roberson]

https://www.mathworks.com/help/simulink/sfg/writing-level-2-matlab-s-functions.html